16.
Used referenceshttp://en.wikipedia.org/wiki/JavaScripthttp://crossbrowsertesting.com/browsershttp://en.wikipedia.org/wiki/Document_Object_Modelhttp://en.wikipedia.org/wiki/Comparison_of_layout_engines_(Document_Object_Model)http://www.w3.org/TR/DOM-Level-2-Core/core.htmlhttp://www.w3schools.com/jsref/default.asphttp://www.visibone.com/javascript/jr3_850.jpghttp://jquery.com/http://html5demos.com/